/**
 * Login - Template Profesional Plata
 * Tema elegante con tonos grises y plateados
 */

:root {
    --primary: #475569;
    --primary-light: #64748B;
    --primary-lighter: #94A3B8;
    --primary-dark: #334155;
    --accent: #0EA5E9;
    --accent-light: #38BDF8;
    --silver: #E2E8F0;
    --silver-dark: #CBD5E1;
}

body.login-page {
    background: linear-gradient(135deg, #1E293B 0%, #334155 40%, #475569 70%, #64748B 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

body.login-page::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 10% 90%, rgba(226,232,240,0.08) 0%, transparent 50%),
        radial-gradient(circle at 90% 10%, rgba(14,165,233,0.12) 0%, transparent 40%),
        radial-gradient(ellipse at 50% 0%, rgba(255,255,255,0.05) 0%, transparent 50%);
    pointer-events: none;
}

.card {
    border: none;
    border-radius: 20px;
    box-shadow: 0 25px 60px -12px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    background: #ffffff;
}

.card-header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    padding: 2rem 1.5rem;
    border-bottom: 3px solid var(--silver);
    position: relative;
}

.card-header::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent-light) 100%);
}

.logo-text h1 {
    color: #ffffff;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
    font-weight: 700;
    letter-spacing: 3px;
}

.logo-text p {
    color: var(--silver);
}

.institucion-text {
    color: var(--accent-light) !important;
}

.login-card-body {
    background: #ffffff;
    padding: 2.5rem;
}

.login-box-msg {
    color: var(--primary);
    font-weight: 500;
}

.form-group label {
    color: var(--primary-dark);
}

.input-group {
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.input-group:focus-within {
    box-shadow: 0 0 0 3px rgba(71, 85, 105, 0.12);
}

.form-control {
    border: 2px solid var(--silver);
    border-radius: 10px 0 0 10px;
}

.form-control:focus {
    border-color: var(--primary-lighter);
}

.input-group-text {
    background: #F8FAFC;
    border: 2px solid var(--silver);
    border-radius: 0 10px 10px 0;
    color: var(--primary-lighter);
}

.input-group:focus-within .input-group-text {
    border-color: var(--primary-lighter);
    color: var(--primary);
}

.btn-login {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    box-shadow: 0 4px 15px rgba(71, 85, 105, 0.3);
    border-radius: 10px;
    padding: 0.9rem 1.5rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.btn-login:hover {
    box-shadow: 0 8px 25px rgba(71, 85, 105, 0.4);
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    transform: translateY(-2px);
}

.btn-login:active {
    transform: translateY(0);
    box-shadow: 0 4px 15px rgba(71, 85, 105, 0.3);
}

.alert-danger {
    background: rgba(220, 38, 38, 0.08);
    border: 1px solid rgba(220, 38, 38, 0.2);
    color: #DC2626;
    border-radius: 10px;
}

.footer-text {
    border-top: 1px solid var(--silver);
}

.footer-text p {
    color: var(--primary-lighter);
}

.footer-text a {
    color: var(--primary);
    font-weight: 600;
}

.footer-text a:hover {
    color: var(--accent);
}